JP2018512835A - Method for operating an electrical circuit - Google Patents

Abstract

For operating an electrical circuit for controllably supplying power from a power source to an electrical load, comprising: a switch further configured to operate in a first conduction mode and a second non-conduction mode; and a controller. A method, comprising the step of stopping the supply of power from a power source to an electrical load. [Selection] Figure 1

Description

  The present disclosure relates to a method for operating an electrical circuit.

  The electrical circuit may be configured with a switch for controlling electrical operation, such as enabling or disabling an electrical load. For example, the switch prevents the first mode of operation in which the switch is “closed” and current is transferred from the switch input to the switch output, and the switch is “opened” and current is not transferred between the switch input and the switch output. The second operation mode can be controlled to be switched.

  During a switching operation, such as switching from a closed state to an open state, current interruption can result in transient electrical characteristics (ie, sudden high voltage spikes and high current spikes above normal operating levels). . In general, transient suppression devices can be configured to absorb transient electrical characteristics to protect the electrical circuit from possible damage due to the transient characteristics.

European Patent No. 1,050,967

  In one aspect, a method for operating an electrical circuit includes: receiving a control signal from a controller by a solid state power controller; and at least partially based on the control signal in response to receiving the control signal, Switching the solid state power controller switch toggle between a conduction mode and a second non-conduction mode within a predetermined switching time. The step of switching between the first mode and the second mode is performed over a period longer than a predetermined switching time.

  In another aspect, a method for operating an electrical circuit includes a control signal from a controller to a solid state power controller toggle that switches between a first conduction mode and a second non-conduction mode during a predetermined switching time. And switching a solid state power controller toggle based at least in part on the control signal to switch between the first mode and the second mode. The step of switching between the first mode and the second mode is performed over a period longer than a predetermined switching time.

  In yet another aspect, a control system for operating an electrical circuit has a switch configured to operate in a first conduction mode and a second non-conduction mode and couples a power source to an electrical load. A solid state power controller and a controller, the controller configured to determine a set of temperature components configured to determine a temperature of the solid state power controller and an operating reference for the solid state power controller And a timing component configured to determine a timing value for switching the switch of the solid state power controller based at least in part on the temperature component and the reference component.

It is a schematic circuit diagram of a power distribution system. Figure 6 is a series of graphs showing the response of a method of operating a power distribution system. 3 is a flowchart illustrating a method for operating a power distribution system. It is a controller for the power distribution system which concerns on the 2nd Embodiment of this invention.

  The described embodiments of the invention relate to electrical circuits such as power distribution systems that may be used, for example, in aircraft. Although this description is primarily directed to aircraft power distribution systems, it also applies to any environment that uses an electrical circuit having a switchable conductive system for delivering electrical signals from a source to a destination.

  FIG. 1 is a schematic of an electrical circuit, such as a typical power distribution system 10 in an aircraft with a power source, shown as a generator 12, an electrical switch such as a solid state switch or solid state power controller (SSPC) 14, and an electrical load 16. A schematic circuit diagram is shown. The generator 12 and the SSPC 14 are electrically coupled by an upstream interconnect such as a first transmission line 18 having inherent electrical characteristics, eg, a first inductance 20 and a first resistance 22. The SSPC 14 and the electrical load 16 are similarly electrically coupled by a downstream interconnect such as a second transmission line 24 having inherent electrical characteristics, eg, a second inductance 26 and a second resistor 28 as well. The Although transmission wiring 18, 24 is described, any suitable conductive interconnect can be utilized to couple generator 12, SSPC 14, and electrical load 16. Non-limiting examples of suitable conductive interconnects can include cables, cable joints, or bus bars.

  One example of the SSPC 14 may comprise a silicon carbide (SiC) -based or gallium nitride (GaN) -based wide bandgap power switch. SiC or GaN have their solid material composition, their ability to handle large power levels with smaller and lighter form factors, and their fast switching ability to perform electrical operations very quickly Can be selected. Other examples of SSPC 14 may include additional silicon-based power switches such as metal oxide semiconductor field effect transistors (MOSFETs) that can also perform high speed switching.

  The SSPC 14 can include a switching component 30, a transient suppression device configured across the switching component 30, and a controller 34. The transient suppression device can include, but is not limited to, a transient voltage suppressor (TVS) 32, a transorb, or a metal oxide varistor (MOV) device. The switching component 30 can include almost any component that can controllably operate or can controllably change between a first conduction mode and a second non-conduction mode in response to a control signal. . In the illustrated example, the switching component 30 further includes a voltage controlled current source (VCCS) 36 that can be controlled in response to a control signal 38 generated by the controller 34. Although the illustrated example illustrates the controller 34 as a partial component of the SSPC 14, embodiments of the present invention can include examples where the controller 34 is external to the SSPC 14, and the SSPC 14, the switchable component 30, Alternatively, the control signal 38 can be provided to at least one of the VCCSs 36.

  The SSPC 14 may include a temperature sensor 40 that detects, measures, or otherwise determines a temperature value associated with at least one of the switching component 30 or the TVS 32. For example, the temperature value can include the actual temperature of the switching component 30 or TVS 32. In addition or alternatively, the temperature value may include a value indicative of or related to the temperature of the SSPC 14 or the controller 34. The temperature sensor 40 can be communicatively coupled to the controller 34. The temperature sensor 40 can transmit, display, or otherwise provide a temperature value (as a respective current characteristic or voltage characteristic) to additional components, such as the controller 34, A process is performed on the characteristics to determine, for example, a change in temperature or temperature value. In addition to or instead of this, the temperature sensor 40 can be integrated with the controller 34. Herein, a non-limiting example of determining the temperature value is described in connection with FIG.

  FIG. 1 further illustrates some of the electrical characteristics of the power distribution system 10 that will be revealed in subsequent figures. Exemplary electrical characteristics include current through TVS 42, current through VCCS 44, voltage drop across TVS and VCCS 48.

  The VCCS 36 can, for example, operate, change, or otherwise control the switch based on the control signal 38 such that the VCCS 36 operates in a substantially binary manner, in which case the first conduction The mode allows unconstrained conduction of current through SSPC 14 or VCCS 36, and the second non-conducting mode prevents conduction of current through SSPC 14 or VCCS 36. In this case, the VCCS 36 can switch between the first and second modes over a very short predetermined switching time. The predetermined switching time can be based, for example, on the minimum switching time of the device. For example, the minimum switching time can be on the order of 10 nanoseconds.

  As a further example, the VCCS 36 may further operate, change, or otherwise control the switch based on the control signal 38 so that the VCCS 36 operates in a manner that is controllably adjusted. For example, the first conduction mode may allow the level of current conduction to be changed in various conduction modes over a predetermined period. The various conduction modes can include linear conduction modes such that the level of current conduction through SSPC 14 or VCCS 36 can be proportional to control signal 38. In addition or alternatively, the various conduction modes include a predetermined conduction scheme. For example, the predetermined conduction scheme may include a non-linear conduction mode, a stepped conduction mode, such as a decreasing conduction mode, or any combination of schemas. In this example, switching from the first conduction mode to the second non-conduction mode allows the current conduction through the SSPC 14 or the VCCS 36 to be controlled over a period longer than the predetermined switching time described above (eg, 10 microseconds). Can be lowered. In addition, switching from the second mode to the first mode can be based on the control signal 38 or can be based on a predetermined conduction scheme. Further various conduction modes can include, for example, rising or falling geometric conduction modes.

  The example controller 34 may further include a general purpose or special purpose computer or other machine with a processor. In general, such computer programs may include routines, programs, objects, components, data structures, algorithms, etc. that have the technical effect of performing a particular task or that implement a particular abstract data type. Machine-executable instructions, associated data structures, and programs represent examples of program code for performing information exchange as disclosed herein. Machine-executable instructions can include, for example, instructions and data which cause a general purpose computer, special purpose computer, or special purpose processing machines to perform a certain function or group of functions. Embodiments of the invention can include examples where the continuity algorithm, pattern, or controllable mode can be stored in the memory of the controller 34 or an external memory accessible by the controller 34. Examples of memory include random access memory (RAM), read only memory (ROM), flash memory, or one or more different types of portable electronic memory, such as disk, DVD, CD-ROM, etc., or these types Any suitable combination of memories can be included. The memory can include all or part of a computer program having an executable instruction set for determining a conduction algorithm, pattern, or controllable mode.

  For example, in an aircraft embodiment, a working gas turbine engine can provide mechanical energy that can be drawn through a spool to provide driving force to the generator 12. The generator 12 also transmits the generated power to the SSPC 14 that delivers the power to the electrical load 16 when the switching component 30 is closed (ie, in the first conduction mode), respectively. Supply through. The power distribution system 10 provides a control signal 38 that indicates a stop of power supply from the generator 12 to the electrical load 16 from the controller 34 to at least one of the SSPC 14, the switching component 30, or the VCCS 36. Can be further operated, or the switch can be changed from the first conduction mode to the second non-conduction mode. In response to the control signal 38, the switching component 30 switches controllably from the first conduction mode to the second non-conduction mode until the supply of power stops.

  When the switching component 30 is opened almost instantaneously (ie, switched to the second non-conducting mode), for example at the predetermined switching time of the previous example, the interruption of current in the power distribution system 10 is the respective first and Due to inherent electrical characteristics, such as the first and second inductances 20, 26 of the second transmission wiring 18, 22, transient electrical characteristics (ie, normal operating levels) in the SSPC 14 of the power distribution system 10 Sudden high voltage spikes and high current spikes). In some electrical or aircraft power distribution systems 10, the transmission wires 18, 22 can be several miles long, which results in significant inductance 20, 26, such as a predetermined switching time, etc. The SSPC 14 causes significant electrical transients during near instantaneous switching over a very short period of time. In addition, some power distribution systems 10 operate at high voltage levels, such as 270 VDC, or at high current levels, such as 100 amps, thereby further providing high levels of electrical transients. For example, the energy stored in the first and second transmission wirings 18, 24 can be on the order of tens of joules, thereby providing large transient electrical characteristics in embodiments of the present invention.

  Almost instantaneously, for example, in embodiments where the switching component 30 is opened at the predetermined switching time of the previous example, transient electrical characteristics are predominantly throughout the TVS 32 so as not to damage the SSPC 14 or the switching component 30. Absorbed and dissipated. Transient electrical characteristics are generally dissipated as heat throughout the TVS 32, which can be dissipated further from the TVS 32 to, for example, a heat sink or to the external environment by convection. Thus, this form and operation, in one example, is larger, more robust, or more capable configured to handle power transients greater than 600 kW and current transients greater than 500 amperes. Requires TVS32. One example of electrical transients is described, but higher and lower voltage transients or current transients can be included, and such transients depend on the electrical characteristics of the electrical circuit.

  Alternatively, in an embodiment of the invention in which the switching component 30 is controllably opened (ie, switched to the second non-conducting mode) for a period later than a predetermined switching time, the transient electrical characteristic is First, due to increasing the time during which the current conduction of the switching component 30 is turned off, thus reducing the instantaneous transients that are experienced over a period of time at any given moment, and second First, it is reduced by absorbing transients experienced across both TVS 32 and switching component 30 or SSPC 14. In this example, the transient is generally dissipated as heat throughout both the TVS 32 and the switching component 30 or SSPC 14, which heat is transmitted from the component 32, 30, 14 to, for example, a heat sink or by convection to the external environment. Can be further dissipated. By absorbing transients received across both TVS 32 and switching component 30 or SSPC 14, TVS 32, in a similar example as previously described, has smaller power transients of less than 350 kW and current transients of less than 350 amperes. Can be configured to be smaller, less robust, or less capable.

  FIG. 2 illustrates a number of time-aligned electrical response graphs illustrating the operation of both the first and second examples described above. In FIG. 2, the first graph 50 shows the current through the VCCS 44 (indicated by I_SW and measured in amperes) and the second graph 52 has the current through the TVS 42 (indicated by I_TVS). , Measured in amperes), the third graph 54 shows the power lost in VCCS 36 (indicated by P_VCCS and measured simply as kW), and the fourth graph 70 shows TVS And the fifth graph 72 shows the corresponding temperature profile 74 of SSPC 14 or switching component 30 (shown as T_SSPC, in degrees Celsius). And the sixth graph 76 is due to electrical stress applied to the TVS 32 during the method. That, (indicated by V_SW, simply be measured as the kV) clamping the voltage measured across the switching element 30 shows the. A first example where the switching component 30 is opened almost instantaneously, for example at a predetermined switching time, is shown as the first signal 56, while the switching component 30 is over a period later than the predetermined switching time. A second example where 30 is controllably opened is shown as second signal 58.

  As shown, at the beginning of method 60, switching component 30 is closed and switching component 30 conducts more current than 600 amperes from generator 12 to electrical load 16. At the second time 62, the controller 34 supplies a control signal 38 indicating that the power supply from the generator 12 to the electric load 16 is stopped to the SSPC 14, and the VCCS 36 performs the second non-operation from the first conduction mode. Responds by switching to conduction mode.

  As indicated by the first signal 56 of the first graph 50, the VCCS current 44 is stopped almost instantaneously 64, while the first signal 56 of the second graph 52 dissipates over time. A transient electrical characteristic or spike in the TVS current 42 corresponding to a time 62 of 2 is shown. The first signal 56 of the third graph 54 has transients in the power of the VCCS 36 corresponding to the second time 62 while the VCCS 36 is opened and therefore no longer conducts. Indicates that it is eliminated rapidly.

  Compare the example response of the first signal 56 with the example response of the second signal 58. In the second time 62, the VCCS 36 is controllably operated to switch from the first conduction mode to the second non-conduction mode over a period 66 that is slower than the predetermined switching time until the supply of power is stopped. Is done. As shown in the second signal 58 of the first graph 50, the VCCS current 44 is decreased linearly over the period 66. As described above, a linearly decreasing conduction mode is shown, but embodiments of the present invention can include a variety of additional conduction modes.

  While the VCCS current 44 decreases over a period of time, the power of the VCCS 36 first rises in response to smaller electrical transients in the system 10, as shown in the third graph 54, after which the switching components Decrease until 30 is fully opened in non-conducting mode. During this same period, the TVS current 42 rises over a period 66 as the amount of VCCS current 44 is reduced, as shown in the second graph 52. During this period 66, both VCCS 36 and TVS 32 absorb and dissipate electrical transients caused by the changing power transmission of distribution system 10. At the end of period 66, as the second graph 52 shows the TVS current 42 dissipating until the time 68 when the transient disappears, all remaining electrical transient characteristics are absorbed and dissipated only by the TVS 32. ing.

  As shown in the first signal 56 of the fourth graph 70, the TVS power dissipation corresponds to a second time 62 when the switching component 30 switches from the first conducting state to the second non-conducting state. Shows transients in the instantaneous TVS power, where most of the transient electrical characteristics are absorbed by the TVS 32 and dissipated as heat over time. Conversely, as shown in the second signal 58, the TVS power dissipation shown in the fourth graph 70 increases over a period 66. This is because the amount of power lost in the VCCS 36 during the same period 66 (as shown in the corresponding third graph 54) is reduced. At the end of period 66, all remaining transient electrical characteristics are absorbed only by TVS 32, as fourth graph 70 shows a decrease in TVS power dissipation 42 until time 68 when the transient disappears. Dissipated.

  The fifth graph 72 shows one example of the temperature profile 74 of the SSPC 14 over the second example of operation, where the switching component 30 is controllably opened over a period that is slower than a predetermined switching time. As indicated by the second signal 58, the temperature increase in the SSPC 14 corresponds to the second time 62. This is because some of the transient electrical characteristics are absorbed by the SSPC 14 and dissipated primarily as heat. After a portion of period 66, transient electrical characteristics are minimized and the temperature of SSPC 14 begins to drop. This is because heat is further dissipated from the SSPC 14 by, for example, a heat sink, convection to the external environment, or other dissipative methods.

  The sixth graph 76 shows one example of the clamp voltage measured across the switching component 30 due to electrical stress applied to the TVS 32 during the method. As shown in the first signal 56, a high level of electrical stress (indicated in kV) is applied across the TVS 32 due to the almost instantaneous switching transient characteristics. Conversely, as shown in the second signal 58, the TVS 32 is subjected to reduced stress by applying stress over a longer period in accordance with an embodiment of the present disclosure, so that during switching operations, A smaller peak clamp voltage results. The smaller peak clamp voltage may further minimize the effects of any parasitic inductance in the TVS 32 wiring.

  Embodiments of the present invention can include SSPC 14, TVS 32, or forms of various conduction modes, patterns, or schemas, where the form is from period 66 or from conduction mode to non-conduction mode. The SSPC 14 expected, estimated, or actual temperature profile may be selected so that it does not meet or exceed the thermal failure threshold in one or more of the aforementioned components 14, 32 during repeated switching. . For example, a method for controllably supplying or interrupting power from the generator 12 to the electrical load 16 includes an estimated amount of heat generated by heat dissipation in at least one of the SSPC 14 or TVS 32 and at least one of the SSPC 14 or TVS 32. It may further include adjusting or calculating various conduction modes, patterns, algorithms, or time periods 66 based at least in part on the estimated or actual ratio of heat dissipation by one side. In this example, the temperature sensor 40 can provide a measurement, estimate, or signal indicative of heat dissipation to or from the SSPC 14 or TVS 32. In such embodiments, the controller 34 can controllably provide a control signal 38 indicative of the calculated or estimated period 66 to at least one of the SSPC 14 or the switching component 30.

  FIG. 3 reveals a non-limiting example of a method 100 for operating an electrical circuit to controllably supply power from a power source such as a generator 12 to an electrical load 16. The method 100 begins with a supply step 110 in which the controller 34 supplies a control signal 38 to at least one of the SSPC 14 or the switching component 30. Next is a control step 120 in which the controller 34 operatively controls at least one of the SSPC 14 or the switching component 30 based at least in part on the control signal 38 to provide a first conduction. Switch from mode to second non-conduction mode. In one non-limiting example, the controller 34 may be based at least in part on further determining heat dissipation due to switching from the first mode to the second mode, for example, SSPC 14, switching components 30 or to control SSPC 14 or switching component 30, such as at least in part, by determining heat dissipation due to transient electrical characteristics applied to at least one of TVS 32. It can operate further.

  In another non-limiting example of an embodiment of the present invention, the controller 34 determines the time period for switching from the first mode to the second mode based at least in part on the determination of heat dissipation. Or it may be further operative to control the switching component 30. Furthermore, the determination of the period is at least partly to prevent SSPC 14, switching component 30, or TVS 32 for each corresponding component from meeting a thermal failure threshold (ie, overheating), as described above. Can be based on. The period determination can also be based at least in part on the desired clamp voltage applied to the TVS 32 previously described. Finally, in the switching step 130, the SSPC 14 or switching component 30 switches from the first conduction mode to the second non-conduction mode for a predetermined period according to the control signal 38.

  The depicted sequence is for illustration purposes only, part of the method may proceed in a different logical order, may include additional or intervening parts, or multiple described parts of the method may be included. It is not intended to limit method 100 in any way, as it can be understood that the described portion of the method can be omitted without compromising the described method.

  FIG. 4 shows another controller 234 according to the second embodiment of the present invention. The second embodiment is similar to the first embodiment, and therefore similar parts are identified using like numbers that are incremented by 200, in which case, unless otherwise mentioned, It will be understood that the description of similar parts of one embodiment applies to the second embodiment. The difference between the first embodiment and the second embodiment is that the controller 234 can further include a temperature component 276, a reference component 278, and a timing component 280. The temperature component 276 may be configured to determine or estimate the temperature of the SSPC 14, the switching component 30, or the TVS 32. In one embodiment of the invention, the temperature component 276 detects or measures a current or voltage across the temperature sensor, the predetermined temperature model, the estimated temperature model, the SSPC 14, the switching component 30, or the TVS 32; Alternatively, any combination of the foregoing examples can be included, but is not limited to these.

  The reference component 278 may determine or obtain a set of operational criteria for the SSPC 14, the switching component 30, or the TVS 32. Examples of operational criteria for SSPC 14, switching component 30, or TVS 32 include the type of switching component 30, the power rating of each component 14, 30, 32, the thermal failure threshold, and the desired clamp voltage of TVS 32. The heat dissipation rate of each component 14, 30, 32, or the heat generation rate of each component 14, 30, 32 can be mentioned, but is not limited thereto. In one example, the criteria component 278 can obtain respective operational criteria from a value database or table.

  Timing component 280 can be configured to determine a period for switching SSPC 14 or switching component 30 from the first conduction mode to the second non-conduction mode, and the determination can be made to temperature component 276 or the reference configuration. At least one of the elements 278 can be based at least in part. For example, the timing component 280 can generate a time period, timing set point, or timing value based at least on a temperature or reference set as described above. In some cases, the timing component 280 may determine the temperature of the TVS 32 as determined by the temperature component 276, the expected heat generation rate in the TVS 32 when exposed to the estimated electrical transient characteristics, and the TVS 32 is the TVS 32. The expected heat dissipation rate of the TVS 32 can be used to provide a switching period that prevents reaching or exceeding the thermal failure threshold. Additional considerations for determining the time period for switching the SSPC 14 or switching component 30 have been described herein.

  In addition to the embodiments and configurations shown in the previous figures, many other possible embodiments and configurations are contemplated by the present disclosure. For example, one embodiment of the present invention provides a total period for controllably operating or switching the switching component 30 from a first conducting state to a second non-conducting state and then returning to the first conducting state. Consider that the electric power load 16 can be shorter than the power interruption reset time. In addition, the configuration and arrangement of the various components can be rearranged so that many different inline configurations can be realized.

  Embodiments disclosed herein provide a method for operating an electrical circuit for controllably supplying power from a power source to an electrical load coupled via a solid state power controller. One advantage that can be realized in the previous embodiment is that the previous embodiment can operate with transient electrical property management that can be controlled during a switching event. Transient suppression devices are physically large, expensive and unreliable devices. Thus, by accurately controlling the transient electrical characteristics that are introduced during switching, the effects of transients can be shared between both the transient suppression device and the SSPC, and thus the required transient suppression device rating. It can be reduced or, in some cases, the required transient suppression device rating can be eliminated altogether. Eliminating lower rated transient suppression devices, or alternatively transient suppression devices, reduces weight and size requirements compared to conventional types of SSPC transient electrical property management systems. Further reducing the stress applied to the transient suppression device or, alternatively, eliminating the transient suppression device further increases the overall reliability of the electrical circuit. In addition, by reducing the stress applied to the transient suppression device, a smaller clamping voltage is created during the switching operation, thereby further minimizing the effects of any parasitic inductance in the transient suppression device wiring. . Also, by reducing the clamping voltage to minimize the effects of parasitic inductance in the transient suppression device wiring, the transient suppression device can be physically separated from certain forms of SSPC without additional negative inductive effects. Can have a greater degree of freedom to be positioned.

  When designing aircraft components, important factors to deal with are size, weight, and reliability. The proposed method for operating electrical circuits results in lower weight, smaller size, improved performance, and higher system reliability. Fewer parts and reduced maintenance result in lower manufacturing costs and lower operating costs. Weight and size reductions are related to the competitive advantage in flight.

  To the extent not yet described, the different features and structures of the various embodiments may be used in combination with each other as desired. The fact that a feature may not be shown in all of the embodiments is not intended to be construed as not showing that feature, but is done for ease of explanation. Accordingly, the various features of the different embodiments may be mixed and adapted as desired to form new embodiments, whether or not new embodiments are explicitly described. All combinations or permutations of the features described herein are covered by this disclosure.

  This written description uses examples to disclose the invention, including the best mode, to form and use any apparatus or system, and to perform any incorporated methods. Enabling any person skilled in the art to practice the invention. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other embodiments are equivalent if they have structural elements that do not differ from the literal words of the claims, or they do not differ substantially from the literal words of the claims. The inclusion of structural elements is intended to fall within the scope of the claims.

Finally, representative embodiments are shown below.
[Embodiment 1]
A method for operating an electrical circuit comprising:
Receiving a control signal from the controller (34) by the solid state power controller (14);
In response to receiving the control signal (38), a solid state power controller (14) switch toggle between a first conduction mode and a second non-conduction mode based at least in part on the control signal (38). Switching within a predetermined switching time;
With
The method, wherein the step of switching between the first mode and the second mode is performed over a period longer than the predetermined switching time.
[Embodiment 2]
2. The method of embodiment 1, further comprising controlling a voltage-controlled current source based at least in part on the control signal (38).
[Embodiment 3]
3. The method of embodiment 2, wherein the step of controlling the voltage controlled current source further comprises controlling the voltage controlled current source in a linear conduction mode for a predetermined period of time.
[Embodiment 4]
2. The method of embodiment 1, further comprising determining heat dissipation resulting from the switching from the first mode to the second mode.
[Embodiment 5]
5. The method of embodiment 4, further comprising determining the period based at least in part on heat dissipation.
[Embodiment 6]
6. The method of embodiment 5, wherein the step of receiving the control signal (38) comprises receiving the determined period.
[Embodiment 7]
6. The embodiment of claim 5, further comprising determining a thermal failure threshold for at least one of the solid state power controller (14) or a transient suppression device and setting the period based at least in part on the threshold. Method.
[Embodiment 8]
5. The method of embodiment 4, wherein the step of determining heat dissipation comprises determining heat dissipation with the switch and a transient suppression device.
[Embodiment 9]
The step of determining the heat dissipation estimates the amount of heat caused by the dissipation by the control device (14) and determines the heat dissipation rate by at least one of the solid state power control device (14) or the transient suppression device. Embodiment 9. The method of embodiment 8, further comprising the step of estimating by the controller (14).
[Embodiment 10]
Receiving a second control signal;
In response to receiving the second control signal, a solid state power controller switching toggle is predetermined between the second conduction mode and the first conduction mode based at least in part on the second control signal. Switching during the second period of
Further comprising
Embodiment 1 according to embodiment 1, wherein the total cycle time for switching the solid state power controller (14) switch in response to the first and second control signals is shorter than the power interruption reset time of the electrical load (16). the method of.
[Embodiment 11]
A method for operating an electrical circuit comprising:
Supplying a control signal (38) from a controller (34) to a solid state power controller (14) toggle that switches between a first conduction mode and a second non-conduction mode during a predetermined switching time;
Switching the solid state power controller (14) toggle based at least in part on the control signal (38) to switch between the first mode and the second mode;
With
The method, wherein the step of switching between the first mode and the second mode is performed over a period longer than the predetermined switching time.
[Embodiment 12]
12. The method of embodiment 11, further comprising the step of determining, by the controller, heat dissipation resulting from the switching from the first mode to the second mode.
[Embodiment 13]
13. The method of embodiment 12, wherein the step of switching further comprises switching the solid state power controller (14) based at least in part on the determination of the heat dissipation.
[Embodiment 14]
14. The embodiment of claim 13, wherein the step of determining further comprises determining heat dissipation due to transient electrical characteristics applied to at least one of the solid state power controller (14) or transient suppression device. the method of.
[Embodiment 15]
15. The method of embodiment 14, further comprising determining the period by the controller based at least in part on heat dissipation.
[Embodiment 16]
The step of determining the time period determines the time period based at least in part on preventing at least one of the solid state power controller (14) or the transient suppression device from meeting a thermal failure threshold. 16. The method of embodiment 15, further comprising the step of:
[Embodiment 17]
12. The method of embodiment 11, further comprising determining a period by the controller (34) based at least in part on a desired clamp voltage applied to a transient suppression device.
[Embodiment 18]
A control system for operating an electric circuit,
A solid state power controller (14) having a switch configured to operate in a first conduction mode and a second non-conduction mode and coupling a power source to an electrical load;
A controller (34),
A temperature component (276) configured to determine a temperature of the solid state power controller (14);
A reference component (278) configured to determine a set of operating criteria for the solid state power controller (14), and at least partially in the temperature component (276) and the reference component (278) A timing component (280) configured to determine a timing value for switching the switch of the solid state power controller (14) based on
A controller (34) comprising:
A control system comprising:
[Embodiment 19]
The controller (34) is communicatively coupled to the solid state power controller (14) and provides a control signal (38) indicative of the timing value to the solid state power controller (14). The control system according to aspect 18.
[Embodiment 20]
The control system according to embodiment 19, wherein the solid state power control device (14) operates between the first conduction mode and the second non-conduction mode in response to the control signal (38).

10 Power Distribution System 12 Generator 14 Solid State Power Converter (SSPC)
16 Electric Load 18 First Transmission Wiring 20 First Inductance 22 First Resistance 24 Second Transmission Wiring 26 Second Inductance 28 Second Resistance 30 Switching Component 32 Transient Voltage Suppressor (TVS)
34 controller 36 voltage controlled current switch 38 control signal 40 temperature sensor 42 transsorb current 44 VCCS current 48 VCCS voltage drop 50 first graph 52 second graph 54 third graph 56 first signal 58 second signal 60 Method Start 62 Second Time 64 Momentary Stop of Power Supply 66 Period 68 Electric Spike Stop 70 Fourth Graph 72 Fifth Graph 74 Switching Component Temperature Profile 76 Sixth Graph 234 Controller 276 Temperature Configuration Element 278 Reference Component 280 Timing Component

Claims (10)

A method for operating an electrical circuit comprising:
Receiving a control signal (38) from the controller (34) by the solid state power controller (14);
In response to receiving the control signal (38), a switch of the solid state power controller (14) between a first conduction mode and a second non-conduction mode based at least in part on the control signal (38). Switching the toggle within a predetermined switching time;
With
The method, wherein the step of switching between the first mode and the second mode is performed over a period longer than the predetermined switching time. The method of any preceding claim, further comprising controlling a voltage-controlled current source (36) based at least in part on the control signal (38). The method of claim 1, further comprising determining heat dissipation resulting from switching from the first mode to the second mode. The method of claim 3, further comprising determining the period based at least in part on heat dissipation. The method of claim 4, wherein the step of receiving the control signal (38) comprises receiving the determined period. The method of claim 4, further comprising determining a thermal failure threshold for at least one of the solid state power controller (14) or a transient suppression device and setting the time period based at least in part on the threshold. . The method of claim 3, wherein the step of determining heat dissipation comprises determining heat dissipation by the switch and a transient suppression device. A control system for operating an electric circuit,
A solid state power controller (14) having a switch configured to operate in a first conduction mode and a second non-conduction mode and coupling a power source to an electrical load (16);
A controller (34),
A temperature component (276) configured to determine a temperature of the solid state power controller (14);
A reference component (278) configured to determine a set of operating criteria for the solid state power controller (14), and at least partially in the temperature component (276) and the reference component (278) A timing component (280) configured to determine a timing value for switching the switch of the solid state power controller (14) based on
A controller (34) comprising:
A control system comprising: The controller (34) is communicatively coupled to the solid state power controller (14) and provides a control signal (38) indicative of the timing value to the solid state power controller (14). Item 9. The control system according to Item 8. The control system according to claim 9, wherein the solid state power control device (14) operates between the first conduction mode and the second non-conduction mode in response to the control signal (38).